Rotifers are one of the fascinating groups of zooplankton in the aquatic ecosystem. They are one of the connecting link organisms between primary producers and consumers of higher order in aquatic food web. Rotifers are important group of zooplankton and acts as good indicators of the changes in water quality as they are strongly affected by environmental conditions and respond quickly to changes in water quality. The present study reports on a collection of 18 species of rotifer from Yenapat a freshwater lake in Bishnupur district of Manipur. Quantitative assessment of rotifers was undertaken during October 2012 to September 2013. The collected rotifers belongs to five family viz. Brachionidae (9 genera), Euclanidae (one genera), Lecanidae (4 genera), Mytilinidae (2 genera) and Filinidae (2 genera).